#ifndef foopolyplibdefhfoo #define foopolyplibdefhfoo /* $Id$ */ /*** This file is part of polypaudio. polypaudio is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. polypaudio is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with polypaudio; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. ***/ #include #include #include #include "cdecl.h" #include "sample.h" /** \file * Global definitions */ PA_C_DECL_BEGIN /** The state of a connection context */ enum pa_context_state { PA_CONTEXT_UNCONNECTED, /**< The context hasn't been connected yet */ PA_CONTEXT_CONNECTING, /**< A connection is being established */ PA_CONTEXT_AUTHORIZING, /**< The client is authorizing itself to the daemon */ PA_CONTEXT_SETTING_NAME, /**< The client is passing its application name to the daemon */ PA_CONTEXT_READY, /**< The connection is established, the context is ready to execute operations */ PA_CONTEXT_FAILED, /**< The connection failed or was disconnected */ PA_CONTEXT_TERMINATED /**< The connection was terminated cleanly */ }; /** The state of a stream */ enum pa_stream_state { PA_STREAM_DISCONNECTED, /**< The stream is not yet connected to any sink or source */ PA_STREAM_CREATING, /**< The stream is being created */ PA_STREAM_READY, /**< The stream is established, you may pass audio data to it now */ PA_STREAM_FAILED, /**< An error occured that made the stream invalid */ PA_STREAM_TERMINATED /**< The stream has been terminated cleanly */ }; /** The state of an operation */ enum pa_operation_state { PA_OPERATION_RUNNING, /**< The operation is still running */ PA_OPERATION_DONE, /**< The operation has been completed */ PA_OPERATION_CANCELED /**< The operation has been canceled */ }; /** An invalid index */ #define PA_INVALID_INDEX ((uint32_t) -1) /** The direction of a pa_stream object */ enum pa_stream_direction { PA_STREAM_NODIRECTION, /**< Invalid direction */ PA_STREAM_PLAYBACK, /**< Playback stream */ PA_STREAM_RECORD, /**< Record stream */ PA_STREAM_UPLOAD /**< Sample upload stream */ }; /** Some special flags for stream connections. \since 0.6 */ enum pa_stream_flags { PA_STREAM_START_CORKED = 1, /**< Create the stream corked, requiring an explicit pa_stream_cork() call to uncork it. */ PA_STREAM_INTERPOLATE_LATENCY = 2 /**< Interpolate the latency for * this stream. When enabled, * you can use * pa_stream_interpolated_xxx() * for synchronization. Using * these functions instead of * pa_stream_get_latency() has * the advantage of not * requiring a whole roundtrip * for responses. Consider using * this option when frequently * requesting latency * information. This is * especially useful on long latency * network connections. */ }; /** Playback and record buffer metrics */ struct pa_buffer_attr{ uint32_t maxlength; /**< Maximum length of the buffer */ uint32_t tlength; /**< Playback only: target length of the buffer. The server tries to assure that at least tlength bytes are always available in the buffer */ uint32_t prebuf; /**< Playback only: pre-buffering. The server does not start with playback before at least prebug bytes are available in the buffer */ uint32_t minreq; /**< Playback only: minimum request. The server does not request less than minreq bytes from the client, instead waints until the buffer is free enough to request more bytes at once */ uint32_t fragsize; /**< Recording only: fragment size. The server sends data in blocks of fragsize bytes size. Large values deminish interactivity with other operations on the connection context but decrease control overhead. */ }; /** Error values as used by pa_context_errno(). Use pa_strerror() to convert these values to human readable strings */ enum { PA_ERROR_OK, /**< No error */ PA_ERROR_ACCESS, /**< Access failure */ PA_ERROR_COMMAND, /**< Unknown command */ PA_ERROR_INVALID, /**< Invalid argument */ PA_ERROR_EXIST, /**< Entity exists */ PA_ERROR_NOENTITY, /**< No such entity */ PA_ERROR_CONNECTIONREFUSED, /**< Connection refused */ PA_ERROR_PROTOCOL, /**< Protocol error */ PA_ERROR_TIMEOUT, /**< Timeout */ PA_ERROR_AUTHKEY, /**< No authorization key */ PA_ERROR_INTERNAL, /**< Internal error */ PA_ERROR_CONNECTIONTERMINATED, /**< Connection terminated */ PA_ERROR_KILLED, /**< Entity killed */ PA_ERROR_INVALIDSERVER, /**< Invalid server */ PA_ERROR_INITFAILED, /**< Module initialization failed */ PA_ERROR_MAX /**< Not really an error but the first invalid error code */ }; /** Subscription event mask, as used by pa_context_subscribe() */ enum pa_subscription_mask { PA_SUBSCRIPTION_MASK_NULL = 0, /**< No events */ PA_SUBSCRIPTION_MASK_SINK = 1, /**< Sink events */ PA_SUBSCRIPTION_MASK_SOURCE = 2, /**< Source events */ PA_SUBSCRIPTION_MASK_SINK_INPUT = 4, /**< Sink input events */ PA_SUBSCRIPTION_MASK_SOURCE_OUTPUT = 8, /**< Source output events */ PA_SUBSCRIPTION_MASK_MODULE = 16, /**< Module events */ PA_SUBSCRIPTION_MASK_CLIENT = 32, /**< Client events */ PA_SUBSCRIPTION_MASK_SAMPLE_CACHE = 64, /**< Sample cache events */ PA_SUBSCRIPTION_MASK_SERVER = 128, /**< Other global server changes. \since 0.4 */ PA_SUBSCRIPTION_MASK_AUTOLOAD = 256 /**< Autoload table events. \since 0.5 */ }; /** Subscription event types, as used by pa_context_subscribe() */ enum pa_subscription_event_type { PA_SUBSCRIPTION_EVENT_SINK = 0, /**< Event type: Sink */ PA_SUBSCRIPTION_EVENT_SOURCE = 1, /**< Event type: Source */ PA_SUBSCRIPTION_EVENT_SINK_INPUT = 2, /**< Event type: Sink input */ PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT = 3, /**< Event type: Source output */ PA_SUBSCRIPTION_EVENT_MODULE = 4, /**< Event type: Module */ PA_SUBSCRIPTION_EVENT_CLIENT = 5, /**< Event type: Client */ PA_SUBSCRIPTION_EVENT_SAMPLE_CACHE = 6, /**< Event type: Sample cache item */ PA_SUBSCRIPTION_EVENT_SERVER = 7, /**< Event type: Global server change, only occuring with PA_SUBSCRIPTION_EVENT_CHANGE. \since 0.4 */ PA_SUBSCRIPTION_EVENT_AUTOLOAD = 8, /**< Event type: Autoload table changes. \since 0.5 */ PA_SUBSCRIPTION_EVENT_FACILITY_MASK = 15, /**< A mask to extract the event type from an event value */ PA_SUBSCRIPTION_EVENT_NEW = 0, /**< A new object was created */ PA_SUBSCRIPTION_EVENT_CHANGE = 16, /**< A property of the object was modified */ PA_SUBSCRIPTION_EVENT_REMOVE = 32, /**< An object was removed */ PA_SUBSCRIPTION_EVENT_TYPE_MASK = 16+32 /**< A mask to extract the event operation from an event value */ }; /** Return one if an event type t matches an event mask bitfield */ #define pa_subscription_match_flags(m, t) (!!((m) & (1 << ((t) & PA_SUBSCRIPTION_EVENT_FACILITY_MASK)))) /** A structure for latency info. See pa_stream_get_latency(). The * total output latency a sample that is written with * pa_stream_write() takes to be played may be estimated by * sink_usec+buffer_usec+transport_usec. The output buffer to which * buffer_usec relates may be manipulated freely (with * pa_stream_write()'s delta argument, pa_stream_flush() and friends), * the buffers sink_usec/source_usec relates to is a first-in * first-out buffer which cannot be flushed or manipulated in any * way. The total input latency a sample that is recorded takes to be * delivered to the application is: * source_usec+buffer_usec+transport_usec-sink_usec. (Take care of * sign issues!) When connected to a monitor source sink_usec contains * the latency of the owning sink.*/ struct pa_latency_info { pa_usec_t buffer_usec; /**< Time in usecs the current buffer takes to play. For both playback and record streams. */ pa_usec_t sink_usec; /**< Time in usecs a sample takes to be played on the sink. For playback streams and record streams connected to a monitor source. */ pa_usec_t source_usec; /**< Time in usecs a sample takes from being recorded to being delivered to the application. Only for record streams. \since 0.5*/ pa_usec_t transport_usec; /**< Estimated time in usecs a sample takes to be transferred to/from the daemon. For both playback and record streams. \since 0.5 */ int playing; /**< Non-zero when the stream is currently playing. Only for playback streams. */ uint32_t queue_length; /**< Queue size in bytes. For both playback and recrd streams. */ int synchronized_clocks; /**< Non-zero if the local and the * remote machine have synchronized * clocks. If synchronized clocks are * detected transport_usec becomes much * more reliable. However, the code that * detects synchronized clocks is very * limited und unreliable itself. \since * 0.5 */ struct timeval timestamp; /**< The time when this latency info was current */ uint64_t counter; /**< The byte counter current when the latency info was requested. \since 0.6 */ }; /** A structure for the spawn api. This may be used to integrate auto * spawned daemons into your application. For more information see * pa_context_connect(). When spawning a new child process the * waitpid() is used on the child's PID. The spawn routine will not * block or ignore SIGCHLD signals, since this cannot be done in a * thread compatible way. You might have to do this in * prefork/postfork. \since 0.4 */ struct pa_spawn_api { void (*prefork)(void); /**< Is called just before the fork in the parent process. May be NULL. */ void (*postfork)(void); /**< Is called immediately after the fork in the parent process. May be NULL.*/ void (*atfork)(void); /**< Is called immediately after the * fork in the child process. May be * NULL. It is not safe to close all * file descriptors in this function * unconditionally, since a UNIX socket * (created using socketpair()) is * passed to the new process. */ }; PA_C_DECL_END #endif